Department of International Development Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
J Hazard Mater. 2010 Jul 15;179(1-3):79-83. doi: 10.1016/j.jhazmat.2010.02.060. Epub 2010 Feb 26.
The photocatalytic decomposition of perfluorooctanoic acid (PFOA) in aqueous solution using Fe and Nb co-doped TiO(2) (Fe:Nb-TiO(2)) prepared by sol-gel method was investigated. The photocatalytic activity of Fe:Nb-TiO(2) towards PFOA degradation was compared to that of pure TiO(2) synthesized using the same method, and that of the commercially available TiO(2) photocatalyst, Aeroxide TiO(2) P25 (AO-TiO(2) P25). The photocatalysts were characterized by XRD, DRS, BET-N(2) adsorption isotherm, and SEM-EDX techniques and the data were correlated to the photocatalytic activity. Fe:Nb-TiO(2) showed the highest activity compared to the undoped TiO(2) and the commercially available TiO(2). Such activity was attributable to the effects of co-doping both on the physico-chemical properties and surface interfacial charge transfer mechanisms. Perfluorocarboxylic acids (PFCAs) with shorter carbon chain length and fluoride ions were identified as photocatalytic reaction intermediates and products.
采用溶胶-凝胶法制备了 Fe 和 Nb 共掺杂 TiO2（Fe：Nb-TiO2），研究了其在水溶液中光催化分解全氟辛酸（PFOA）的性能。将 Fe：Nb-TiO2 对 PFOA 降解的光催化活性与采用相同方法合成的纯 TiO2 和市售 TiO2 光催化剂 Aeroxide TiO2 P25（AO-TiO2 P25）进行了比较。采用 XRD、DRS、BET-N2 吸附等温线和 SEM-EDX 技术对催化剂进行了表征，并将数据与光催化活性相关联。与未掺杂的 TiO2 和市售的 TiO2 相比，Fe：Nb-TiO2 表现出最高的活性。这种活性归因于共掺杂对物理化学性质和表面界面电荷转移机制的影响。鉴定出具有较短碳链长度和氟离子的全氟羧酸（PFCAs）为光催化反应中间体和产物。
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